chamberlain



N.. LfCHAMBERLAIN. Die forBaising- Letters `on Type Wheels,V

.Patented July 9, 1862.'-

@eine .gratta datent @frn NATHANIEL L. cnAMBE-RL-AIN, .or BOSTON,MASSACHUSETTS. l Lean-s Patent No. 66,562, ma July 9, 1867.

@te tlgaul referrer tu iu tigen tcttcrs gzztert un nuttig per nf tlgstmt B; it known that I, NATHANrEn L. GHAMBERLAIN, of Boston, in thecounty of Sutfo1k,'and State of VMassachu'setts, have invented a new andimproved Mode of Forming Letters or Figures on the Perimeter of MetallicRings, of which the following is a. full, clear', and iexactdescription, reference being had to the accompanying drawings, 'making apart of thisispccitication, in whielri i 4 Figure 1 represents aperspective view of a .device for carrying out-my invention.

Figure 2 is a plan view, with the cover removed.

Figure 3 is a transverse vertical section g and Figure 4 represents aring with gures formed on its face. I

Similar letters indicate like parts in the several figures.

Myiinvention is designed more particularly for forming figures orletters on the perimctcrs of numbering or dating-Wheelsused in ahand-stamp machine, though it may be employed for other purposes.

The object of my invention is to avoid the expense and labor of cuttingor castingletters origures on the perimet'crs 'of metal Wheels or ringsfor printing the dates Vand numbers in hand-stamps.l and the inventionconsists in forming the required letters or figures upon the saidperimeters by means of a pressure applied from the centre of the ringsor wheels, so as to force the outer surface of .the same'against or upona corresponding surface of metal, in which are sunk the letters orfigures to be formed upon the wheeh l Referring to the drawings, arepresents a de-block formed of a solid piece of metal, with a circularspace in the interior, and provided with an opening in the centre. 7c isacover which tits tightly on the die-block,

and is provided with a similar opening in itseeentre. 6 representcircular segmental pieces or blocks of metal arranged within thedie-block, and having sunken their inner periphery a series of lettersor. igures. d represents u 'wheel or annulus, which may be made of brassor qLhlersnita-blc metal, uponvwhich the letters or figures are to beformed, its outer face fitting closely in contact withthe segmentalbloclrs b b. The annulus ellis designed to be attached to and form apart of the type-wheel used in hand-stamps. Within the wheel'or'annulusd are fitted four segmental blocks or pieces of metal c c, innner facesof the segments c c correspond in form with the central opening .in thedie-block a; the opening in the said segments is madersomewhat smallerthan that of the die-block. e represents a plunger of a taper-ingform,as shown, to be inserted in the opening' of the die-block and segments,and through which it is forced.y The'opening in theme-block andsegmental pieces, instead of being square, may be circular, and theplunger be made to'correspond ryith the same; and

' the ring d, instead of being of circular form, may be polygonal, andcorresponding faces may be made on the segments Z2. The segments c c maybe dispensed with,.und the plunger e inay be made suh'iciently large topress directly upon the inner face of the ring d, the opening in thedie-block being correspondingly enlarged. l

The operation isas follows: The segments Z1 b being properly arrangedwithin the 'dic-block, the ring i fitted in the same, and within the`ring are arranged the segments c e. The cover being then secured to thedieblock, the plunger is inserted Within the opening, its sides bearingat a `point of its inferior diameter against the faces of the segments cc. Force is then applied to the `upper end of the plunger, either by aheavy blow or by any gradual pressure, which forces the outer face ofthe ring d against the segments b I), and thus imparts to the said ringthe forms of the letters or figures which are sunk on the said segments.

What I claim as my invention, and desire to secure by Letters Patent,is-The combination of a tapering plunger, e, with the segmental blocks b 6,arranged within a dielblock, and having letters or gures sunk on theirinner faces as described, and with or without the intcrposition of theinner segments c c, whereby, als the plunger is forced through thecentro of the die, corresponding letters or figures will be formed onthe outer face of a ring, d, substantially as described. A

In testimony whereof I have'signed my name to this specification in thepresence of two subscribing witnesses.

NATHL L. CHAMBERLAIN.

Witnesses:

DEXTER H. CHAMBERLAIN, Jos. H. ADAMS.

